Furnace-roof.



. PATBNTED AUG. 4,- 1908. F. MILLIKBN. `FURNAGE ROOF.' Y APPLICATIOH FILED 001222, 1907.

. SHEETS-sunm- 1.

arm/- Aos/Q ;rgsrna MILLIKEN, OFNEW YORK, NY.'

- f rUnnacE-Roor'.

Naaesas. l

citizen of the United States, and a resident Yofthe city of New. York, borough of Manhattan, in the county and State of New York, have invented anew and Improved Furnace- Roof, of which the folle-ving is a full, clear, and exacdescriptiou.

T his invention is an improved roof, more especially designed f for open hearth steel furnaces, 'and having for an object primarily to provide for the expansion and contraction. f the roof-in both a longitudinal and transverse direction.

The invention further contemplates the provision of a roof which may be easily and economically erected, repaired and adjusted, and which will o erate todeflect the heat to thebath of the rnace and have a natural tendency to remain tight at the joints, wherebythe escape of the heat-from lthis sourceA is prevented. 1

Reference is to be had to the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a cross-section through a furnace roof embodying my invention, the section being taken substantially on the line 1-1 of Fig. 2; Fig. 2 is a fragmentary plan of the same; Fig. 3 is a longitudinal section through the roof on the line 3 3 of Fig. 2; Fig. 4 is a perspective view ofa fire roof brick employed in 'the construction o the alternate arches, Fig. 5 is a like View of a brick which is used in the intermediate arches; Fig. 6 is a plan of a modified form of the roof; and Fig. 7 is a section on the line 7 7 ofFig.6.`

My improved furnace roof is com osed of a series of arches of ircproof brick, t e alternate arches of which' are built of brick 5, convexo-concave on theirtop and bottom faces res tively in a direction arallel to the arc as shown in Fig. 4. hose brick, it will be observed, are wedge-shaped in both cross and longitudinal section and have convergent and divergent opposite sides, the enlarged-portion in a longitudinal direction being at the top, and the enlarged portion in a transverse directionarrangerl at the bottom.

`The intermediate arches are composed of ireproof brick 6, concave-convex on their top and bottom faces respectively, and are also wedge-shaped both transverselyv and longitudinally and have convergent and di- Spericaton of Ilettera IPatient.

Application tiled October 22, 1907. Serial Ho. 398,547.

vergent opposite sides,` as shown in The enlarged portions of these brick, in thel construction of the intermediate arches, are arranged atthe to'p and are keyed 'together Patented Aug. 4, 1908,

not only in the direction of the arch, but also cross-wise thereof by the downwardly divergent sides o the arches. com osed of the rick 5, as shown in Fig. 3, an vform in connection therewith, a roof arched in one direction and corrugated in the opposite direction. it is apparent 'from this construction that the longitudinal expansion and contraction of the roof will be provided for by the corrugations, and the expansion and contraction transversely of'thc roof will be compensated for by the rise and fall of the arch; j

Should one or more .blocks of the roof burn out the", may be replaced Without destroying the adjacent arches and also without the necessity of scaffolding `over the inside'of the l roof, as is the common practice -in furnace roofs of the customary construction. The roof possetses further advantages over the ordinary roof, among which may be mentioned that in the.erection of 'a roof bf the usual type, it is necessary to scaffold entirely over the furnace, whereas in theconstrucma be p acef under the center of the several brick 6 composing the intermediate arches dropped in position; the erection would therefore be' accomplished with less scaffoldingand could be. performed uicker and tion of n1 improved roof, a supporting ridge varc ies composed of the brick 5, and the i cheaper, Asince no particular skil is required in the building operation. l

l/Vhen a portion of the arch of a furnace roof as usually constructed burns out, the brick fall in, leaving the balance of the'roof in a dangerous condition. This is obviously 'not true of a roof embodying my improvements, since should any of tlio arches composed of either the brick 5 or brick 6 burn out, they will settle down without injury to the arches adjacent thereto. The roof moreover ill by reason of the corru ations tend to reflect the -heat to the bath of t c fur:r nace and will, under the action of gravity, kee tight at the pints, whereby the escape of t: ie heat throng i cracks will be prevented. In Figs. B and 7 I have shown thedepressed portions of the corrugations or channelsvof r i 89,5,3B8

Having thus described my invention, .I claim as new and desire to secure 'byLetters Patent:

flo

1. A furnace roof comprising a series of archeshaving convergent and divergent o posite sides and composed of iireproof bricli, the brick of the alternate arches being concavo-convex in a direction parallel to the arch, and the brick composing the intermearches of fireproof vbrick corrugated in a di,- rection transverse to said arches on both its inner and outer faces, and with the corruga tions on both faces in substantial conformity to each other.' y

5. A furnace roof comprising a series of arches Wedge-shaped in cross-section, composed of freproof brick, and corrugated in a direction transverse of said arches.

6. A furnace roof com rising a series of uarches of fireproof brick, t e -brick of the alternatc arches having convex tops and concave' under faces arranged parallel to the arch and having the opposite sides thereof converging upwardl.-

7. A furnace roo comprising a series of,

arches offire'proof brick the brick of the aI- ternate arches having comtops and com vex under faces arranged parallel to the arch ing upwardly.

fireproof archesthe.--alternate arches of which are concavo-convex 1n cross-section,

concave in a like direction.

9. A furnace roof comprisinga series of which arc cncavo-convcx in cross-sectibn and have convergent and divergent opposite sides, and the intermediate arches being con-v vexo-concave in cross-section with counterpart sides.

10. A furnace roof corrugated in one direction and arched in a direction transverse depressions or'channcls of the corrugations,

1 1. A furnace roof corrugated in one direction and arched` in a direction transverse thereto, and Water pipes for cooling the roof, arranged at both sides thereof in the depressions or channels of the corrugations.

and corrugated in another direction, with the corrugations in the roof in substantial conformity on both-its inner and outer faces.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FOSTER MILLIKEN. Witnesses:

JOHN M. ELLIS,

A. A. CANNON.

thereto, andcooling means arranged in the'- 12. A ireproof roof arched in one direction 40 and having the opposite sides thereof diverg- 8. A'furnace roof comprising a seriescf and the intermediate arches being convexofreproof arches, the alternate archesof. 

